You will learn some helpful science in this video to survive a grenade blast awesomely, If you think you will ever have the unfortunate opportunity to come face to face with a grenade. The grenade blast causes the most damage to your ear drums resulting in disorientation of the victim, perhaps covering your ears with your hands could prevent some damage. With the damage to your lungs your whole torso and rib cage will have some resistance to the shock wave it would still hurt a lot but still could be survivable. but yes probably the best way to survive a grenade is to be 15 feet away laying prone with your feet point towards the grenade. You also got to take in account that the grenade blast won’t just be pressing in one direction but also directions all around it.